A place like the Right Livers' Rest was bound to draw freaks, same as molasses draws flies. 1935, George Goodchild, chapter 5, in Death on the Centre Court: By one o'clock the place was choc-a-bloc.
Swallowing certain types of poisons may cause excessive salivation. According to the National Library of Medicine, pesticides can cause excessive saliva when they are swallowed. Venom from snake bites or insect stings is another type of poisoning that can cause the malady.
Conversely, normal saliva production may appear excessive in animals with an anatomic abnormality that allows saliva to dribble out of the mouth, or are affected with a condition that affects swallowing. Ingestion of a toxin, a caustic agent, or a foreign body can also lead to ptyalism.